During the afternoon it was so hot at the bottom of the dune that the oryx (gemsbok) ran to the top of the dune to cool down. When it got to the top, the oryx stopped and posed long enough for me to capture this shot. Location: Sossusvlei, Namibia. (Photograph: Bo Fu)

Courtesy of National Geographic, this magnificent photo by Bo Fu is now available free to download from Trivia SA.